Hard facing alloy



\ 10 My hard facing allo is particularly useful I 45 a dny state, thenheating said mixture until Patented June 23, 1931 1,811,487

UNITED STATES PATENT OFFICE ELMER G. IBELIDING, F WHITTIER, CALIFORNIA,ASSIGNOR 'IO NATIONAL TOOL AND iMETALS, INCORPORATED, OF\TORRANCE,CALIFORNIA, A CORPORATION 01! GALI- HABD FACING ALLOY In; Drawing.Application filed April 1c, 1929. se ial No. 355,662.

This invention relates to a hard facing alloy which is adapted to beplaced upon the cutting edges or surfaces of tools, bearing surfaces, orthe like, for the purpose of ma- 5 terially increasing the useful lifeof the surfaces so' treated and also to enable tools, or

the like, to penetratejharder substances than would be possible'with theordinary metal of which the tool is made.

Whenplaced upon drilling bits used in the drilling of oil wells or uponthe cutting edges of reamers, core bits, or other similar articles ordevices. K

My alloy consists of a tantalum base to which molybdenum and tungstenare added. This alloy'consists of approximatelyfifty-five per centtantalum more or less, four per cent molybdenum, and forty-one per centtung- 2 sten, more or less. These three metals are mixed dry in theproportions stated and are then placed in a carbon crucible and heatedunder the electric arc until the metal is in a molten condition.

.After the metal has set somewhat the crucible is quenched in water inorder to shatter it andi the alloy'is then allowed to completely cooAfter the cooling the alloy is crushed un- 3 der a hammer into smallpieces or it may be rolled if desired.

The small pieces of alloy are then inserted or placed upon the cuttingedge or surface of the tool, or the like, by means of the elec trio areor oxy-acetylene flame.

. Having described my invention, I claim: v lrA hard facing alloycomprising fift five per cent tantalum, four per cent moly denum,forty-one per cent tungsten;

2. Themethod of forming a -hard facing alloy comprising mixing fift-five per cent tantalum, four per cent moly denum, fort one. per centtungsten, said tantalum, moly denum and tungsten being mixed together inthe metals are in a molten condition, then. .j cooling the alloy, andthen breaking the mass 7 into small particles.

In testimp ly'whereof, I afix my signature.

' ELMER C. BELDING.

